CFD及响应面分析法优化设计重力式油水分离器入口构件

摘要

降低重力式油水分离器内轴向流速的相对不均匀度（M_f）能够有效提高聚结构件的聚结作用和油水分离效率。采用一种改进的圆孔分散式入口构件，距离其150 mm处安装平行板聚结构件，通过CFD数值模拟、Box-Benhnken设计和响应面分析法寻找入口构件的3个主要几何参数的最优化组合使聚结构件起始端处横截面上轴向流速的M_f达到最小，结果表明：3个参数即入口构件上圆孔面积与分离器横截面面积之比（P₁）、半球面封头与圆柱侧面上圆孔面积比（P₂）、侧面孔口到封头边缘的距离与分离器横截面直径（D）之比（P₃）对M_f的影响存在交互作用；最适宜组合为P₁=0.03，P₂=0.1和P₃=0.036，得到M_f的最小值接近0.58。

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	江朝阳
	乔胜超
	王日杰
	杨晓霞

关键词：重力式油水分离器； CFD；圆孔分散式入口构件；响应曲面法；相对不均匀度

Abstract：

A decrease in the relative unevenness (M_f) of axial liquid velocity can improve the coalescence performance and separation efficiency in the gravity oil/water separator with coalescence component. A modified inlet component with round orifices was adopted, and the coalescence component with parallel plates was installed at 150 mm from the inlet. CFD simulation coupled with the Box-Benhnken design and response surface method was used to obtain the optimal combination of three main geometrical parameters for the lowest M_f on the cross section at the beginning of the coalescence component. Simulated results showed that there were interactions among the influences in M_f caused by these three parameters, that is, the ratio (P₁) of total round orifices area on the inlet to the cross section area, the orifices area ratio (P₂) of hemispherical seal head to cylindrical side face, the ratio (P₃) of distance (l₁) between side face orifices and head seam to the cross section diameter (D); M_f had a minimum value being almost 0.58 for an optimal combination of P₁, P₂, P₃ being 0.03, 0.1 and 0.036, respectively.

Keywords： gravity oil/water separator； CFD simulation； inlet distributor with round orifices； response surface method； relative axial velocity unevenness

Received 2014-08-31;

Corresponding Authors: 杨晓霞,E-mail: xxy@tju.edu.cn。 Email: xxy@tju.edu.cn

About author: 江朝阳(1988-),男,硕士研究生,现从事油水分离过程的数值模拟研究。

引用本文:

江朝阳, 乔胜超, 王日杰, 杨晓霞.CFD及响应面分析法优化设计重力式油水分离器入口构件[J]. 化学工业与工程, 2016,33(5): 79-85

Jiang Chaoyang, Qiao Shengchao, Wang Rijie, Yang Xiaoxia.Optimal Design of Inlet Component of Gravity Oil/Water Separator by CFD and Response Surface Method[J]. Chemcial Industry and Engineering, 2016,33(5): 79-85

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